At present, the United States has a higher incarceration rate per capita than any other country. What is one of the biggest challenges of this approach?

The annual cost of housing a prisoner is so high.

Explanation:

In United States, incarceration is considered as one of the important  forms of punishment given to the criminals. It is also taken as rehabilitation of the prisoners of felony and the other offences.

Incarceration is that state of keeping the offenders confined or imprisoned in houses and other detention centers.

Presently. United States have the highest rate of incarceration per capita in the world. And one of the major problems that US faces is that the housing or keeping the prisoner in detention houses is very costly and US have to spend huge amount of money on it.

the answer would be a)henry grady because he came up with the term "new south"